Actually, EB, my current idol swapping macro equips the Idol of the Raven Goddess when I'm in a raid and the Starfire idol when I'm soloing. I'm just amazed at what my theorycrafting is telling me about how genuinely ineffective the Moonfire idol is in a standard casting rotation. You need at least 2x Moonfire per 12-13 sec for it to take the lead, which is a mind-boggling waste of mana and/or GCDs. About the only place it's useful is in MF/Wrath spam situations, placing it firmly on the PvP side of things.

Hmm, I did some reading on Elitist Jerks over the weekend and they seem to think that the Moonfire idol has a 50% proc rate instead of 30% as I originally thought. This changes my figures quite a bit. (Also, the SF idol is 55, not 57 - shows what I get by working from memory).

So, the Raven Goddess comes out ahead when you consider its benefit to the raid as a whole, and the fact that its effect increases as the DPS of the party goes up, whereas the Moonfire idol has a static benefit based solely on the ratio of Moonfire in your rotation.